See the below image for the Window structure with labels diagram. Jambs are the main vertical parts forming the sides of a window frame. A sill is the main horizontal part forming the bottom of the frame of a window. A jambliner is a strip which goes on the sides of a window frame that provides a snug fit for the window sash. The interior of a window is the side homeowners will see most frequently.
The best way to compare windows and their labels is to visit one of our local showrooms in Maryland and Northern Virginia. We have a huge selection of windows on display from some of today’s best manufacturers, including Weather Shield and Infinity from Marvin.
To the right of the U-Factor on a window label is the Solar Heat Gain Coefficient (SHGC), which ranges from 0 to 1. This measures how well the window hinders radiant heat gain caused by exposure to direct sunlight.
Window structure diagram with labels image
